M&S says

It's easy for kids to stay clean and smart all week long with this two pack of everyday school shirts. Slim fit for a closer feel, these short sleeve shirts offer comfort and ease of movement for those active days at school. With our excellent Non Iron technology, they’re ideal for busy mornings and leaving the house without delay. They also use our durable Stain Resistant finish, offering a head start against spills and stains. Dyed responsibly, these practical short sleeve school shirts are the ultimate in style and convenience.

Care and Composition

35 days to return - You may return or exchange unused products within 35 days of purchase with a valid parcel summary document. Your items don't need to be in the original box or bag as long as they're securely packaged.How to return
1. FREE returns to select M&S stores
2. Easy returns from home. Simply print the returns label, attach it to the top of your parcel and insert the returns note in the parcel. We will automatically deduct the cost of return from your refund.
To print the returns label and return, simply click here.Tell me more about how to return items and the returns policy